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Trash star 9 EP

HD 155133

RA 257.8583° · Dec -38.4117° · star

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Score breakdown

· 3 badges
9 pts · Trash
Trash 15 pts → Common
  • Star +3
  • On the zodiac +3
  • Orange K-type star +3
Total score 9

6 more points to reach Common.

Badges

  • Star · +3
  • On the zodiac · +3
  • Orange K-type star · +3

Trivia

Hard to believe

  • True brightness. It pours out about 1.5 million times as much light as the Sun. It only looks ordinary because it is so far away.

What it actually is

  • Spectral class. Its spectrum reads K2 — a K-type star. Orange K dwarfs are the marathon runners of the galaxy, burning steadily for tens of billions of years.

Find it in the sky

  • How to spot it. At magnitude 9.4 you'll want a small backyard telescope, over in Scorpius.
  • Southern sky. It rides the southern half of the sky — an easier target the further south you are.
  • Best time of year. It stands highest in the middle of the night around June — that's when to go looking.

What's in a name

  • Its catalogue. The HD number is from the Henry Draper Catalogue, in which Annie Jump Cannon personally classified the spectra of nearly 400,000 stars — still the largest such feat by one person.

Properties

absmag
-10.61
constellation
Sco
luminosity
1527566.0582
mag
9.39
name
HD 155133
spect
K2

About HD 155133

HD 155133 is a trash star. It sits in the constellation Sco, shines at apparent magnitude 9.39 and has spectral type K2.

Its spectrum reads K2 — a K-type star. Orange K dwarfs are the marathon runners of the galaxy, burning steadily for tens of billions of years.

How to see it

Look for HD 155133 in the constellation Sco. At apparent magnitude 9.39, a small backyard telescope will bring it into view.

Like any astronomical target, HD 155133 is best seen from a dark site away from city lights, and when it is above the horizon depends on your latitude and the time of year. The visibility panel above works out tonight's viewing window for your saved location.

Why HD 155133 is a trash star

HD 155133 scores 9 points on Spacedle's rarity scale, which places it in the trash tier. Another 6 points would lift it into a rarer tier.

That score comes from 3 science badges — Star, On the zodiac and Orange K-type star — each earned for a real, measurable property of the object. Rarity on Spacedle is never random: the more remarkable an object's astrophysics, the more badges it collects, the higher it scores, and the rarer it ranks.